Datasheet

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date
07/14/2015
page
1 of 7
SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
FEATURES
•
•
•
•
•
•
•
•
•
•
up to 50 W isolated output
2:1 input range (18~36 Vdc, 36~75 Vdc)
smaller package
single, regulated output
1,500 Vdc isolation
short circuit, over current, input under voltage protection
remote on/off
operating temperature range (-40~85°C)
six sided metal shielding
efficiency up to 93%
MODEL
input
voltage
output
voltage
output
current
output
power
ripple
and noise1
efficiency
typ
(Vdc)
range
(Vdc)
(Vdc)
min
(mA)
max
(A)
max
(W)
max
(mVp-p)
typ
(%)
PQA50-D24-S3-D
24
18~36
3.3
500
10
33
150
91
PQA50-D24-S5-D
24
18~36
5
500
10
50
150
93
PQA50-D24-S12-D
24
18~36
12
208
4.167
50
150
93
PQA50-D24-S15-D
24
18~36
15
167
3.333
50
150
93
PQA50-D24-S24-D
24
18~36
24
104
2.083
50
150
93
PQA50-D48-S3-D
48
36~75
3.3
500
10
33
150
91
PQA50-D48-S5-D
48
36~75
5
500
10
50
150
93
PQA50-D48-S12-D
48
36~75
12
208
4.167
50
150
93
PQA50-D48-S15-D
48
36~75
15
167
3.333
50
150
93
PQA50-D48-S24-D
48
36~75
24
104
2.083
50
150
93
Notes:
1. Ripple and noise are measured at 20 MHz BW by "parallel cable" method with 1 μF ceramic and 10 μF electrolytic capacitors on the output.
PART NUMBER KEY
PQA50 - DXX - SXX - DX
Base Number
Input Voltage
Output Voltage
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Packaging Style
DIP
Heatsink
"blank" = no heatsink
H = with heatsink
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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
date 07/14/2015 │ page 2 of 7
INPUT
parameter
conditions/description
min
typ
max
units
operating input voltage
24 Vdc input models
48 Vdc input models
18
36
24
48
36
75
Vdc
Vdc
input under voltage protection
24 Vdc input models
48 Vdc input models
18
36
start-up voltage
under/over voltage shutdown
Vdc
Vdc
input over voltage protection
24 Vdc input models
48 Vdc input models
36
75
Vdc
Vdc
input under voltage protection
24 Vdc input models
48 Vdc input models
16
32
Vdc
Vdc
input over voltage protection
24 Vdc input models
48 Vdc input models
surge voltage
for maximum of 1 second
24 Vdc input models
48 Vdc input models
start-up time
nominal input, constant load
40
81
Vdc
Vdc
-0.7
-0.7
50
100
Vdc
Vdc
10
ms
6
mA
models ON (CTRL open or connect TTL high level, 3~12 Vdc)
CTRL1
models OFF (CTRL connect GND or low level, 0~1.2 Vdc)
input current (models OFF)
filter
pi filter
Note 1. CTRL pin voltage is referenced to GND.
OUTPUT
parameter
conditions/description
typ
max
units
line regulation
full load, input voltage from low to high
min
±0.2
±0.5
%
load regulation
10% to 100% load
±0.5
±1
%
±1
±3
%
voltage accuracy
adjustability
±10
%
switching frequency
PWM mode
300
kHz
transient recovery time
25% load step change
300
500
μs
transient response deviation
25% load step change
±3
±5
%
temperature coefficient
100% load
±0.02
%/°C
PROTECTIONS
parameter
conditions/description
over voltage protection2
3.3 Vdc output models
5 Vdc output models
12 Vdc output models
15 Vdc output models
24 Vdc output models
min
over current protection
short circuit protection
max
units
3.9
6.2
15
18
30
Vdc
Vdc
Vdc
Vdc
Vdc
135
%
110
°C
continuous, automatic recovery, hiccup
over temperature protection
Note
typ
2. Module needs to be re-started after over voltage protection.
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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
date 07/14/2015 │ page 3 of 7
SAFETY AND COMPLIANCE
parameter
conditions/description
isolation voltage
input to output at 1 mA for 1 minute
1,500
min
typ
isolation resistance
input to output at 500 Vdc
1,000
isolation capacitance
input to output at 100 kHz, 0.1 Vdc
conducted emissions
CISPR22/EN55022 class B (external circuit required, see figure 1)
radiated emissions
CISPR22/EN55022 class B (external circuit required, see figure 1)
ESD
IEC/EN61000-4-2 class B, contact ± 4kV
radiated immunity
IEC/EN61000-4-3 class A, 10V/m
EFT/burst
IEC/EN61000-4-4 class B, ± 2kV (external circuit required, see figure 1)
surge
IEC/EN61000-4-5 class B, ± 2kV (external circuit required, see figure 1)
conducted immunity
IEC/EN61000-4-6 class A, 3 Vr.m.s
voltage dips & interruptions
IEC/EN61000-4-29 class B, 0%-70%
MTBF
as per MIL-HDBK-217F @ 25°C
RoHS
2011/65/EU
max
units
Vdc
MΩ
2,000
pF
1,000,000
hours
ENVIRONMENTAL
parameter
conditions/description
min
max
units
operating temperature
see derating curve
-40
85
°C
-55
125
°C
5
95
%
105
°C
10
G
storage temperature
storage humidity
non-condensing
case temperature
at full load, operating temperature curve range
vibration
10~55 Hz, 30 min. along x, y, and z
typ
SOLDERABILITY
parameter
conditions/description
max
units
hand soldering
1.5 mm from case for 10 seconds
min
typ
300
°C
wave soldering
see wave soldering profile
260
°C
max
units
Peak Temp. 260°C Max.
Wave Soldering Time
4 Sec. Max.
250
Temperature (°C)
200
10 Sec. Max.
150
100
50
0
Time (sec.)
MECHANICAL
parameter
conditions/description
dimensions
board mount: 50.80 x 25.40 x 11.80
board mount with heatsink: 50.80 x 25.40 x 16.30
min
case material
aluminum alloy
weight
board mount
board mount with heatsink
typ
mm
mm
35
43
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g
g
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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
date 07/14/2015 │ page 4 of 7
MECHANICAL DRAWING
BOARD MOUNT
Vin
2
GND
3
Ctrl
4
Trim
5
0V
6
+Vo
6
1
2
5
3
4
Grid Size:
2.54mm x 2.54mm
4
3
5
2
6
1
Bottom View
PCB Layout
Top View
11.80
[0.465]
1
∅1.50 [0.059]
25.40[1.000]
Function
50.80[2.000]
45.72[1.800]
10.16 10.16
[0.400] [0.400]
PIN
10.16
[0.400]
PIN CONNECTIONS
5.08[0.200]
units: mm[inch]
tolerance: ±0.30[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
∅1.00[0.039]
4.10 [0.161]
Front View
BOARD MOUNT WITH HEATSINK
units: mm[inch]
tolerance: ±0.30[±0.012]
pin diameter tolerance: ±0.10[±0.004]
pin height tolerance: ±0.50[±0.020]
∅1.50 [0.059]
Grid Size:
2.54mm x 2.54mm
PIN CONNECTIONS
PIN
Function
1
Vin
2
GND
3
Ctrl
4
Trim
5
0V
6
+Vo
4
3
5
2
6
1
Top View
PCB Layout
Top View
Front View
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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
date 07/14/2015 │ page 5 of 7
DERATING CURVES
Output Voltage ≤ 5Vdc
Output Voltage > 5Vdc
With heatsink
With heatsink
100
Without heatsink
80
60
Load (%)
Load (%)
100
Safe operating area
40
20
-40
Without heatsink
80
60
Safe operating area
40
20
-20
0
20
40
55 65
85
100
-40
-20
Ambient Temperature (°C)
0
20
40
60 70
85
100
Ambient Temperature (°C)
EMC RECOMMENDED CIRCUIT
Figure 1
LCM
Table 1
Recommended external circuit components
CY 1
Vin
Vin
+Vo
Cout
DC/D C
C0
GND
GND
LOAD
Vin (Vdc)
24
48
C0
330μF/50V
330μF/100V
CY1, CY2
1nF/2kV
1nF/2kV
LCM
2.2mH
2.2mH
0V
CY 2
Note:
1. See Table 3 for Cout values.
TEST CONFIGURATION
Figure 2
Table 2
Oscilloscope
External components
Lin
Cin
Lin(4.7µH)
Note:
Current
Probe
DC DC
Load
Cin(220µF, ESR < 1.0Ω at 100 KHz)
Lin
4.7μH
Cin
220μF, ESR < 1.0Ω
at 100 kHz
1. Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance.
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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
date 07/14/2015 │ page 6 of 7
APPLICATION NOTES
1. Requirement on output load
To ensure this module can operate efficiently and reliably, the minimum output load cannot be less than 5% of the full load during
operation. If the actual output power is small, please connect a resistor at the output end in parallel to increase the load.
2. Recommended circuit
This series has been tested according to the following recommended testing circuit before leaving the factory. This series should be
tested under load (see Figure 3). If you want to further decrease the input/output ripple, you can increase capacitance properly or
choose capacitors with low ESR (see table 3). However, the capacitance must not exceed the maximum capacitive load or a start-up
problem might arise (see table 4).
Figure 3
Vin
+Vout
DC
Cin
DC
0V
GND
Table 3
Table 4
Vout
(Vdc)
Cin
(µF)
Cout
(µF)
3.3
100
220
5
100
220
12
100
100
15
100
100
24
100
47
Vout
(Vdc)
Max.
Capacitive Load
(μF)
3.3
27000
5
18900
12
3700
15
2000
24
1000
3. Output Voltage Trimming
Leave open if not used.
Figure 4
Formula for Trim Resistor
Application Circuit for Trim Pin
aR2
Vref
(part in broken line is the interior of models)
-R3
up: RT =
a=
R1
R 2-a
Vo’-Vref
+ Vo
+Vo
down: R T =
R1
V re f
R3
RT
R1
Trim
V re f
R3
Trim
R2
RT
R2
0V
0V
Tr im up
Tr im down
a=
Vo’-Vref
R2
Vref
Note:
Value for R1, R2, R3, and Vref (see Table 5)
RT: Trim Resistor
a: User-defined parameter, no actual meanings
Vo': The trim up/down voltage
Table 5
Notes:
aR1
-R3
R 1-a
Vout
(Vdc)
R1
(kΩ)
R2
(kΩ)
R3
(kΩ)
Vref
(V)
3.3
4.788
5
2.87
2.87
15
1.24
2.87
12.1
2.5
12
11
2.87
22
2.5
15
24
15
3
22
2.5
20
2.308
15
2.5
1. Minimum load shouldn't be less than 5%, otherwise ripple may increase dramatically. Operation under minimum load will not damage the converter, however, they may not meet all specifications listed.
2. Maximum capacitive load is tested at input voltage range and full load.
3. All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified.
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CUI Inc │ SERIES: PQA50-D │ DESCRIPTION: DC-DC CONVERTER
date 07/14/2015 │ page 7 of 7
REVISION HISTORY
rev.
description
date
1.0
initial release
07/01/2013
1.01
added heat sink option, updated spec
10/29/2013
1.02
updated datasheet
07/14/2015
The revision history provided is for informational purposes only and is believed to be accurate.
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